5 results about "Vacuum grease" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

A heater optimized ball valve is provided that includes one or more heat flux components. A heater optimized ball valve may be a modular ball valve including a plurality of end caps secured to a valve body frame having a ball disposed within the frame between at least two of the end caps, where the modular ball valve includes a thermally conductive grease including a mixture of a vacuum grease and a metal alloy powder, the metal alloy powder being thermally conductive to the ball, and the vacuum grease being thermally conductive to the ball. And at least one seal disposed on the top outer diameter surface of the ball and on the inner proximal facing surface of the top end cap, at least partially filling a top gap separating the two surfaces, and disposed on the bottom outer diameter surface of the ball valve and on the distal facing surface of the bottom end cap, at least partially filling a gap separating the two surfaces.

The invention provides a method for coating grease for a spatial hundred million conversion slip ring, which comprises the following steps of: S1, oiling an insulating layer: controlling the surface roughness of the insulating layer by adopting a method of soaking the insulating layer in base oil; s2, filling grease; s3, sample injection grease coating: controlling the grease surface amount by adopting volume quantification; s4, checking after coating; s5, running-in after coating: enabling the sample introduction grease to uniformly cover a slip ring loop through multiple running-in; s6, removing redundant sample introduction grease; and S7, removing redundant sample injection grease, and checking after resetting. Through a reasonable coating process and comprehensive performance detection, uniform distribution of grease is achieved, the problems that vacuum grease coating of the space slip ring is not uniform, and the electric contact performance is difficult to control are solved, the long service life and reliability of the space slip ring in the space environment are guaranteed, and the method is suitable for space slip ring products which are high in rotating speed, long in service life and high in stability.

The invention belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing and a using method.The vacuum dynamic sealing structure comprises an external powder blocking module and a dynamic sealing module, and the external powder blocking module is composed of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate; the first powder blocking plate is fixed to the top of the plasma gun body to form an arc-shaped shielding face, and the powder blocking ring is coaxially arranged on the positive electrode of the plasma gun body in a sleeving mode and forms an annular gap type powder blocking structure with the insulating powder blocking plate. The dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the invention has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The utility model relates to the technical field of gas permeability testing, and discloses a gas permeability tester, which comprises a motor fixedly connected to a bottom output shaft of an electric push rod I; the glue injection pump is in through connection with the outer side wall of the glue barrel; the scraping plate is arranged at the bottom of the output end of the glue injection pump, and the output end of the glue injection pump penetrates into the scraping plate; the glue injection opening is formed in the front side wall of the scraper, and the top of the glue injection opening is communicated with the output end of the glue injection pump. Firstly, a steering mechanism is controlled to enable a structure at the bottom of a supporting plate to rotate to the position above a lower cavity plate, a motor and a glue injection pump are started, the motor drives a bottom plate to rotate clockwise through a connecting rod, the bottom plate drives a scraping plate with the top connected with a glue barrel to slide on the lower cavity plate, and at the moment, the glue injection pump conveys vacuum grease in the glue barrel to a glue injection opening; the surface of the lower cavity plate is coated with vacuum grease through the glue injection opening, the vacuum grease is evenly coated through the moving scraping plate, and after the motor drives the scraping plate to rotate by a circle, coating of the vacuum grease on the upper surface of the lower cavity plate is completed.